2个水稻光温敏核不育系开花习性及异交特性初步研究
A Preliminary Study on Flowering Habits and Outcrossing Characteristics of Two PTGMS Lines in Rice
马进贤 1邓征宇 2周跃良 3熊伟 3卢含思 1董韩逸 1黄冰归 2林立东 3温圣贤1
作者信息
- 1. 湖南农业大学农学院,湖南长沙 410128
- 2. 湖南省烟草公司永州市公司,湖南永州 425000
- 3. 湖南恒德种业科技有限公司,湖南长沙 410125
- 折叠
摘要
以HD9802S为对照,对2个新育成的籼型光温敏核不育系恒59S和双香77S的开花习性及异交特性进行研究.结果表明,恒59S花时集中,开花高峰明显,花期较长,柱头外露率高,柱头活力强,有利于杂交制种;双香77S虽花时集中,开花高峰明显,但花期较短,柱头外露率较低,柱头活力较弱.比较2个不育系的异交特性,恒59S的柱头总外露率和双边外露率均显著高于双香77S,说明恒59S更有利于异交结实,可作为配制杂交组合的优良不育系在育种中加以利用.
Abstract
In comparison to the control line HD9802S,this study investigated the flowering habits and cross-pollination characteristics of two newly developed indica photoperiod-thermo-sensitive genic male sterile(PTGMS)lines,Heng 59S and Shuangxiang 77S.The results showed that Heng 59S exhibited a concentrated blooming time with a clear peak,longer flowering duration,higher stigma exsertion rate,and stronger stigma vigor,which favor hybrid seed production.While Shuangxiang 77S also had a concentrated blooming time with a clear peak,but its flowering duration was shorter and it showed lower stigma exsertion rate and weaker stigma vitality.Comparing the cross-pollination characteristics of the two sterile lines revealed that both total stigma exsertion rate and double stigma exsertion rate were significantly higher in Heng 59S than in Shuangxiang 77S.This suggests that Heng 59S is more favorable for successful cross-pollination and seed setting,making it an excellent candidate for use as a male sterile line in breeding programs.
关键词
杂交水稻/光温敏核不育系/开花习性/柱头活力/异交结实率Key words
hybrid rice/PTGMS line/flowering habit/stigma vigor/cross-pollination seed-setting rate引用本文复制引用
基金项目
湖南省烟草公司永州市公司科技项目(2022xczx-108)
出版年
2024
国家科技期刊平台
NSTL
万方数据